Tuesday, March26, 2019 L-36.com


Marine Weather and Tides
Spring Lake, MI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:36AMSunset 8:05PM Tuesday March 26, 2019 6:06 AM EDT (10:06 UTC) Moonrise 12:35AMMoonset 10:18AM Illumination 71% Phase: Waning Gibbous; Moon at 20 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LMZ846 Holland To Grand Haven Mi- 412 Pm Est Fri Jan 25 2019
.heavy freezing spray warning in effect through Saturday morning...
.small craft advisory in effect through Saturday afternoon...
Tonight..Northwest winds 10 to 20 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet.
Saturday..Southwest winds 10 to 20 knots. Mostly cloudy with a slight chance of snow showers. Freezing spray. Waves 2 to 3 feet.
Saturday night..West winds 20 to 25 knots. Snow showers likely in the evening, then a chance of snow showers overnight. Heavy freezing spray through the night. Waves 3 to 5 feet.
Sunday..Northwest winds 10 to 20 knots. Mostly cloudy with a chance of snow showers. Heavy freezing spray. Waves 3 to 5 feet. This is the last nearshore marine forecast (nshgrr) issuance for the season. The nshgrr will again be issued around april 1st 2019, or as conditions warrant.
LMZ846 Expires:201901260415;;342100 FZUS53 KGRR 252113 CCA NSHGRR Nearshore Marine Forecast...corrected National Weather Service Grand Rapids MI 412 PM EST Fri Jan 25 2019 For waters within five nautical miles of shore on Lake Michigan LMZ846-260415-


7 Day Forecast for Marine Location Near Spring Lake, MI
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location: 43.07, -86.19     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 260719
afdgrr
area forecast discussion
national weather service grand rapids mi
319 am edt Tue mar 26 2019
latest update...

synopsis discussion

Synopsis
Issued at 319 am edt Tue mar 26 2019
- dry with moderating temperatures through Wednesday, with a chance
of rain Wednesday night through Thursday
- wet period Friday into Saturday with a mixture of precipitation
expected
- cooler and drier Sunday and Monday

Discussion (today through next Monday)
issued at 319 am edt Tue mar 26 2019
minimal concerns through the first few periods of the forecast
through Wednesday. A very dry air mass has advected over the area,
and ridging aloft and the sfc high moving right across the area will
bring another very sunny and dry day today. More high clouds will be
around on Wednesday as we see a weak short wave aloft move overhead,
and moisture out ahead of the next system starts to approach the
area.

We will see a threat of rain push in overnight Wednesday night, and
gradually push south and east on Thursday. We will see a 40+ knot
low level jet translate into the area ahead of a sfc front that will
extend from a low up in canada. This period does not look like we
will see much pcpn as the low level jet is waning, we are initially
dry and we do not see a significant amount of moisture advect in. It
is interesting however, as there is actually a little bit of
instability at 850 mb and above. Not quite enough yet to insert
thunder into the forecast, but we are watching.

The much better chance for pcpn will come late Friday into the first
half of Saturday. We will see the front moving through on Thursday
slide south of the area, and stall out temporarily. We will then see
a healthy short wave arrive from the pacific, and bring another
surge of warm and moist air up and over the stalled out front. In
addition, the models have been generally consistent in a northern
stream diving in behind the first short wave, and boosting it. There
will be some gulf moisture tapped, but the dynamics look to drive
more of the pcpn.

The placement of heaviest pcpn, and p-type are still a bit uncertain
due to the interaction and phasing of the two waves. It does look
like the northern periphery of this system will see a decent chance
of snow, while the southern portion will see mainly rain. Can not
rule out a mix either. It will take some decent snow rates where it
does snow during the day to get accumulations. The better chance
will be Friday night away from the warm sector where accumulating
snow will be more likely. It is tough to pin down the details at
this time, so we will continue to monitor the latest trends.

It does look like the system should move out later Saturday, with
some residual snow showers possible into Sunday morning until the
upper trough axis passes east of the area. Cooler air will hold over
the area then Sunday, before temperatures should start to moderate
on Monday.

Aviation (for the 06z tafs through 06z Tuesday night)
issued at 128 am edt Tue mar 26 2019
we should not see any impacts to aviation interests today with
regards to the forecast. High pressure and dry air will allow for
mainly clear skies, except maybe a few wisps of cirrus late. Winds
will be somewhat variable and under 5 knots for the most part with
the high moving overhead today. Kmkg will see a lake breeze
develop from the SW in the afternoon.

Hydrology
Issued at 1042 am edt Mon mar 25 2019
rivers across most of southwest lower michigan are back within their
banks, except for a few sites on the grand and muskegon rivers.

Standing water has also receded across the area with a few roads
remaining closed in newaygo and kent counties. No flood warnings or
advisories remain in effect.

River levels will continue to gradually fall through the next week
as only light precipitation is expected. The snow that remains over
the muskegon basin will undergo a slow and steady melt as
temperatures warm up.

Grr watches warnings advisories
None.

Synopsis... Njj
discussion... Njj
aviation... Njj
hydrology... 63


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 13 mi26 min E 5.1 G 5.1 25°F 1032.4 hPa13°F
HLNM4 - 9087031 - Holland, MI 21 mi36 min 29°F 35°F1029.1 hPa8°F
SVNM4 - South Haven, MI 47 mi36 min ENE 5.1 G 7 30°F
LDTM4 - 9087023 - Ludington, MI 62 mi36 min 21°F 15°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI9 mi71 minN 010.00 miFair24°F10°F57%1030.7 hPa
Holland - West Michigan Regional Airport, MI23 mi73 minN 010.00 miFair27°F10°F49%1030.5 hPa

Wind History from MKG (wind in knots)
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Last 24hrN9N8NE11NE11NE12E12
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N6NE7W7N8NW8NW10NW8NW10N7N8NE3CalmCalmN5CalmNE3CalmE4
1 day agoSW8SW6SW3SW5W5SW7SW5SW8W6W7W5W6W5NW6N5N9N13NE10NE10NE8NE6NE7N6N7
2 days agoCalmCalmCalmE33W7SW9W4SW8SW8SW10SW8SW8S9S4S3S6CalmCalmSW7SW9SW8SW7SW8

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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wmap_A
GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Grand Rapids, MI (6,6,7,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.